-This project only covers the history of the 32 active NFL franchises. The NFL had a number of NFL franchises that folded prior to 1953 that are not included in this data.

-The data does not consider moves impacted by stadium renovations/construction. Events such as the Chicago Bears playing at the University of Illinois in 2002 or the Houston Oilers/Tennessee Titans playing in Memphis while waiting for completion of their new stadium in Nashville are not included.